USB Isolator

Avoid interference and earth loops

Published in issue 10/2012 on page 14

If your USB device ever suffers from noise caused by an earth loop or if you want to protect your PC against external voltages then you need a USB isolator. The circuit described here offers an optimal electrical isolation of both the data lines as well as the supply lines between the PC and the USB device.The project itself is a spin-off from an earlier design for a portable oscilloscope for Android.

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